1921140134 has 8 divisors (see below), whose sum is σ = 2943023328. Its totient is φ = 940132360.

The previous prime is 1921140121. The next prime is 1921140139. The reversal of 1921140134 is 4310411291.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1921140139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10218737 + ... + 10218924.

It is an arithmetic number, because the mean of its divisors is an integer number (367877916).

Almost surely, 2^1921140134 is an apocalyptic number.

1921140134 is a deficient number, since it is larger than the sum of its proper divisors (1021883194).

1921140134 is a wasteful number, since it uses less digits than its factorization.

1921140134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20437710.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1921140134 is about 43830.8126093961. The cubic root of 1921140134 is about 1243.1389718554.

The spelling of 1921140134 in words is "one billion, nine hundred twenty-one million, one hundred forty thousand, one hundred thirty-four".